OCKLOCKNEE AND AUCILLA RIVERS. 
Ill 
MINERAL RESOURCES. 
LIMESTONE . 
The limestones of this area have been used for road building and 
for various miscellaneous purposes. These limestones, all of which 
are of the Chattahoochee formation, are found chiefly in the south¬ 
eastern part of Leon, the eastern part of Wakulla and the southern 
part of Jefferson counties. The formation, however, comes to the 
surface at places in the northern part of Leon and Jefferson coun¬ 
ties. Much of the rock used in Wakulla County is in the form of 
hard boulders lying on the surface. Although much of this rock is 
found at the surface in the southern part of Jefferson County, it is 
not being utilized at present, owing to a lack of transportation. 
At Burns, in Wakulla County, the limestone rock of this forma¬ 
tion has been produced for many years by B. M. and W. C. Cates. 
The rock is either picked up over the surface of the ground, or is 
obtained by shallow quarries. It is sold in bulk, or is broken for 
.concrete material. In recent years also the rock has been ground 
and sold for agricultural purposes. At the present time this rock is 
being quarried in Wakulla County by G. W. Rhodes, and is used 
in building roads. 
BRICK-CLAYS. 
No brick is being manufactured within this area at the present 
time, although it is probable that some of the clays are. suitable for 
making common building brick. Two brick-making plants, the 
Ocklocknee Brick Company and the Tallahassee Pressed Brick 
Company, are each located just across Leon County line in Gadsden 
County. Many years ago building brick was made from the red 
sandy clays near Tallahassee. 
A sample of clay from the property of W. M. Carraway, near 
Wacissa in Jefferson County, has been tested in the United States 
Clay Testing Laboratory at Pittsburg, Pa. The report on this 
sample taken from Press Bulletin No. 7 of the Florida Geological 
Survey, is as follows: 
Sample No. 21. Jefferson County. Medium plastic with fair working prop¬ 
erties; water <?f plasticity, 32.6%; no drying difficulties; linear drying shrinkage, 
9.77% ; linear’burning shrinkage, at 990 degrees C., 0.22% ; at mo C., 1.09% ; at 
1230 C., 0.55%; at 1320 C., 0.49%; buff burning; per cent porosity, at 990 de- 
